CRYSTALLISING POLYETHER POLYOLS, A METHOD FOR PRODUCING THEM AND USE OF THE SAME

摘要

The invention relates to crystallising polyether polyols which can be produced by first reacting propylene oxide and polyhydroxy compounds in the presence of an alkoxy compound containing zinc and/or aluminium atoms, in order to obtain a crystallising polyether polyol with an average molecular weight Mn of 500 to 5000, and then reacting the crystallising polyether polyol thus obtained with 10 to 90 wt. % of an epoxide in relation to the quantity of the crystallising polyol, in the presence of a catalyst that does not polymerise propylene oxide stereospecifically, in order to obtain a crystallising polyether polyol with an average molecular weight Mn of 1000 to 20 000. The invention also relates to a method for producing the crystallising polyether polyols and to their use for producing polyurethane materials, especially polyurethane foams, elastomers and coatings.